- AST-extract all remaining routes from api.py into routers/*.py
- Group routes by OpenAPI tag (AI, Advanced, Agency, ..., x402)
- Keep existing auth/health/scraping/templates routers; add *_api.py for remaining routes of those tags
- Move shared helpers/models/variables with the routes that need them
- Update tests/test_api.py to import vision helpers from routers.vision
- Regenerate openapi.json (186 paths)
- All 497 tests pass; ruff clean
